1023091440 has 320 divisors, whose sum is σ = 3781662720. Its totient is φ = 223948800.

The previous prime is 1023091439. The next prime is 1023091457. The reversal of 1023091440 is 441903201.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1023091440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6775365 + ... + 6775515.

It is an arithmetic number, because the mean of its divisors is an integer number (11817696).

Almost surely, 2^1023091440 is an apocalyptic number.

1023091440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1023091440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1890831360).

1023091440 is an abundant number, since it is smaller than the sum of its proper divisors (2758571280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1023091440 is a wasteful number, since it uses less digits than its factorization.

1023091440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1023091440 is about 31985.8005996411. The cubic root of 1023091440 is about 1007.6386491369.

Adding to 1023091440 its reverse (441903201), we get a palindrome (1464994641).

The spelling of 1023091440 in words is "one billion, twenty-three million, ninety-one thousand, four hundred forty".